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Finding the Fourth Proportional to 664.90, 998.07 and 340.18

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Solution

The fourth proportional to 664.90, 998.07 and 340.18 is: 510.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.90 : 998.07 = 340.18 : x
  2. Step 2: Convert to fraction form
    664.90/998.07 = 340.18/x
  3. Step 3: Cross multiply
    664.90x = 998.07 × 340.18
  4. Step 4: Simplify right side
    664.90x = 339,523.45
  5. Step 5: Solve for x
    x = 339,523.45/664.90
  6. Step 6: Final answer
    x = 510.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.